<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div{
            width:80%;
            height: 300px;
            background-color: pink;
            display: flex;
            justify-content: space-around;
        }

        div span{
            width:150px;
            height: 100px;
            background-color: purple;
            margin-right: 5px;
            flex:1;
        }
    </style>
</head>
<body>
    <div>
        <span>1</span>
        <span>2</span>
        <span>3</span>
    </div>
</body>
</html>